I don't know anything, but this certainly tracks like he's concerned that he may not survive an impeachment, and is trying to return favors while he can.
Who benefits most from this withdrawal? It seem like that's the Syrian government and their Russian allies, as they'll be the biggest players after we leave.
Honestly though, I don't see how he loses an impeachment vote in the Senate. I just don't see the GOP bending like that even after the Trump Foundation decision, barring even more serious revelations to come.
I do happen to know those and a few other things...
The first is, yes, impeachment may truly be in the offing, I could almost say its a definite. What is absolutely not iffy is, as you allude, that the right overwhelmingly retains the Senate.
Impeachment, proven only a false accusation in the Senate, will be overturned, reflect poorly on the venomous vindictive out of control left that has clearly shown us all its ass, its true ends justifying means motivations in Kavanaugh v Ford [see 83 dismissals by Fed judge panel and We, the American public].
So that is something as solid as we both can know.
Number 2 FACT is that there is not a single shred of ANY verified evidence, much less near match the standard of a proof, of ANY Trump campaign illegal activities with the Ru Rus Russ Russians.
And, especially for people who want us to quit sticking our noses everywhere, what need we be there for? The ME is was, and will be for the foreseeable future, an unsolvable mess.
We have enough energy and supply of our own, let Europe and the rest of the world fend for itself awhile... come in strategically when an ISIS type pops its head up, kill it before it reproduces.
Which ultimately means we cannot elect slenderfella types that won't pull the trigger
Cheaper, so less American blood and treasure misspent over the inexorable. Maybe then the EU will pull its head out of those places arrears and start acting like the adults, mindful of their horrendous errors of the past but required to participate in their own future, they need be. If only to hold up their end of what has been a very magnanimous bargain by the US taxpayers. We benefitted too, sure no doubt.
I cannot tell, don't know if Europe sufficiently wants to survive tho.
If there is any one place on the globe where it benefits to back out the way we came... its there in the Middle East. Let the treacherous Saudis duke it out with the even more treacherous Iran Syria Russians for a bit, see if they don't pull more in alignment with countering their own terrorism outreaches, clean up the family business, modernize in a more Western and freer manner... or not.
We could use a bit of distance to stand back and survey, see what is what and, as always, do what is in our, America's, primary interests short and long term.